Facebook is making new revelations about government orders for user data. / Karen Bleier, AFP/Getty Images

by Brett Molina, USA TODAY

by Brett Molina, USA TODAY

Facebook says a glitch may have exposed portions of the personal contact information, such as email addresses or phone numbers, of roughly 6 million users.

In a statement posted Friday, the social network says the bug is tied to uploading contact lists or address books, which are used in creating friend recommendations.

"Because of the bug, some of the information used to make friend recommendations and reduce the number of invitations we send was inadvertently stored in association with people's contact information as part of their account on Facebook," reads a statement from Facebook Security. "As a result, if a person went to download an archive of their Facebook account through our Download Your Information (DYI) tool, they may have been provided with additional email addresses or telephone numbers for their contacts or people with whom they have some connection."

Facebook says the bug has been fixed, and no other personal or financial information was compromised. Also, the social network says they have found no proof the glitch is being used maliciously.

Although Facebook insists it will likely have little impact, the company apologized for the glitch. "It's still something we're upset and embarrassed by, and we'll work doubly hard to make sure nothing like this happens again."